Gas in Colorado averaged $2.64 in 2018 — $3.38 in today’s money
Average, that year
$2.64
In 2025 dollars
$3.38
The average price of a gallon of regular gasoline in Colorado across 2018, shown both as it was at the pump and adjusted for inflation to constant 2025 dollars (CPI-U).
Across the year
How Colorado prices moved through 2018
Weekly average for regular gasoline. The year’s high was $2.93 the week of October 8, 2018; the low was $2.24 the week of December 31, 2018 — a swing of 31.2%.
View the weekly data (53 weeks)
| Week of | Nominal | 2025 $ |
|---|---|---|
| January 1, 2018 | $2.40 | $3.10 |
| January 8, 2018 | $2.39 | $3.09 |
| January 15, 2018 | $2.40 | $3.10 |
| January 22, 2018 | $2.41 | $3.12 |
| January 29, 2018 | $2.45 | $3.17 |
| February 5, 2018 | $2.47 | $3.19 |
| February 12, 2018 | $2.46 | $3.17 |
| February 19, 2018 | $2.43 | $3.13 |
| February 26, 2018 | $2.39 | $3.08 |
| March 5, 2018 | $2.37 | $3.06 |
| March 12, 2018 | $2.37 | $3.05 |
| March 19, 2018 | $2.38 | $3.07 |
| March 26, 2018 | $2.44 | $3.15 |
| April 2, 2018 | $2.49 | $3.20 |
| April 9, 2018 | $2.49 | $3.20 |
| April 16, 2018 | $2.60 | $3.35 |
| April 23, 2018 | $2.61 | $3.36 |
| April 30, 2018 | $2.62 | $3.37 |
| May 7, 2018 | $2.64 | $3.39 |
| May 14, 2018 | $2.72 | $3.49 |
| May 21, 2018 | $2.79 | $3.59 |
| May 28, 2018 | $2.87 | $3.68 |
| June 4, 2018 | $2.86 | $3.67 |
| June 11, 2018 | $2.84 | $3.64 |
| June 18, 2018 | $2.81 | $3.60 |
| June 25, 2018 | $2.77 | $3.56 |
| July 2, 2018 | $2.79 | $3.57 |
| July 9, 2018 | $2.78 | $3.57 |
| July 16, 2018 | $2.77 | $3.55 |
| July 23, 2018 | $2.74 | $3.52 |
| July 30, 2018 | $2.73 | $3.49 |
| August 6, 2018 | $2.73 | $3.50 |
| August 13, 2018 | $2.73 | $3.50 |
| August 20, 2018 | $2.74 | $3.51 |
| August 27, 2018 | $2.78 | $3.55 |
| September 3, 2018 | $2.82 | $3.60 |
| September 10, 2018 | $2.83 | $3.61 |
| September 17, 2018 | $2.87 | $3.66 |
| September 24, 2018 | $2.87 | $3.67 |
| October 1, 2018 | $2.90 | $3.70 |
| October 8, 2018 | $2.93 | $3.74 |
| October 15, 2018 | $2.92 | $3.71 |
| October 22, 2018 | $2.88 | $3.67 |
| October 29, 2018 | $2.85 | $3.64 |
| November 5, 2018 | $2.82 | $3.59 |
| November 12, 2018 | $2.74 | $3.49 |
| November 19, 2018 | $2.65 | $3.38 |
| November 26, 2018 | $2.61 | $3.33 |
| December 3, 2018 | $2.50 | $3.19 |
| December 10, 2018 | $2.44 | $3.11 |
| December 17, 2018 | $2.36 | $3.00 |
| December 24, 2018 | $2.28 | $2.90 |
| December 31, 2018 | $2.24 | $2.85 |
Year over year
How 2018 compares, adjusted for inflation
2018 was Colorado’s 13th-most-expensive year for gas on record, adjusted for inflation — equivalently, the 15th-cheapest of 27 years (2000–2026).
Every grade
Colorado fuel prices by grade in 2018
Year-average price per grade. Premium figures are the spread drivers paid for higher-octane fuel that year.
| Grade | Avg / gal | 2025 $ | vs. regular |
|---|---|---|---|
| Regular | $2.64 | $3.38 | — |
| Midgrade | $2.91 | $3.73 | +27.3¢ |
| Premium | $3.20 | $4.10 | +56.0¢ |
Common questions
Colorado gas prices in 2018, answered
- What was the average price of gas in Colorado in 2018?
- The average price of regular gasoline in Colorado in 2018 was $2.64 per gallon — about $3.38 in 2025 dollars after adjusting for inflation, according to U.S. Energy Information Administration weekly data.
- How high did gas prices get in Colorado during 2018?
- Colorado's weekly average for regular gasoline peaked at $2.93 the week of October 8, 2018 and bottomed out at $2.24 the week of December 31, 2018 — a swing of 31.2% across the year.
- Were gas prices in Colorado higher in 2018 than in 2017?
- Adjusted for inflation, regular gasoline in Colorado was more expensive in 2018 than in 2017, up 11.0% year over year.
- How does 2018 rank for gas prices in Colorado history?
- Adjusted for inflation, 2018 was the 13th-most-expensive year for regular gasoline in Colorado out of the 27 years EIA has published weekly prices (2000–2026).